Coinmarketcap
All time High figure is not correct for CoinGecko.
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I think its clear here that Coingecko.com has the superior website and API.
Just check out these two API Queries for ZenProtocol and Bitcoin.
Zen Protocol
https://api.coingecko.com/api/v3/coins/zen-protocol
Coingecko has been my go to for last many years.
Recent days, I’ve found https://messari.io/onchainfx as a good option in general. A lot of cool stuff here.